Evidence map›Paper›PMID 26164709›Full record

Trial reportEuropean journal of applied physiology2015

Effect of 3-week high-intensity interval training on VO2max, total haemoglobin mass, plasma and blood volume in well-trained athletes.

Verena Menz, Jochen Strobl, Martin Faulhaber, Hannes Gatterer, Martin Burtscher

Abstract readRandomized Controlled Trial
PubMed Publisher
In one paragraph

Trial report in European journal of applied physiology, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers, 4 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
16citing papers in PubMed, 4 pooled it
3.6field-weighted citation impact, top 8% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

16 citing papers in PubMed, 4 syntheses or guidelines pooled it, 41 citations in OpenAlex.

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  15. Assessment of Maximal Aerobic Capacity in Ski Mountaineering: A Laboratory-Based Study.International journal of environmental research and public health · 2021
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

5 authors at 1 institution in 1 country.

Verena MenzMedical Section, Department of Sport Science, University Innsbruck, Fürstenweg 185, 6020, Innsbruck, Austria. verena.menz@student.uibk.ac.at.
Jochen StroblMedical Section, Department of Sport Science, University Innsbruck, Fürstenweg 185, 6020, Innsbruck, Austria.
Martin FaulhaberMedical Section, Department of Sport Science, University Innsbruck, Fürstenweg 185, 6020, Innsbruck, Austria.
Hannes GattererMedical Section, Department of Sport Science, University Innsbruck, Fürstenweg 185, 6020, Innsbruck, Austria.
Martin BurtscherMedical Section, Department of Sport Science, University Innsbruck, Fürstenweg 185, 6020, Innsbruck, Austria.
Innsbruck Medical University · AT

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeThis study examined the haematological adaptations to high-intensity interval training (HIT), i.e. total haemoglobin mass (tHb-mass), blood volume (BV), and plasma volume (PV), and its effects on VO2max in well-trained athletes.

methodsTwenty-seven male and eight female well-trained (VO2max 63.7 ± 7.7 ml/min/kg) athletes were randomly assigned to the HIT (HITG, N = 19) or the control group (CG, N = 16). Over a 3-week period, the HITG performed 11 HIT sessions, consisting of four 4-min interval bouts at an exercise intensity of 90-95 % of the individual maximal heart rate (HRmax), separated by 4-min active recovery periods. Before and 5 ± 2 days after the intervention, tHb-mass, BV and PV were determined by the CO-rebreathing method. VO2max was assessed in a laboratory treadmill test.

resultstHb-mass (from 753 ± 124 to 760 ± 121 g), BV (from 5.6 ± 0.8 to 5.6 ± 0.9 l) and PV (from 3.2 ± 0.5 to 3.2 ± 0.5 l) remained unchanged after HIT and did not show an interaction (group × time). Within the HITG, VO2max improved from baseline by +3.5 % (p = 0.011), but remained unchanged in the CG. No interaction (group × time) was seen for VO2max. The HITG showed a significant reduction in HRmax compared to the baseline measurement (-2.3 %, p ≤ 0.001), but HRmax remained unchanged in the CG. There was a significant interaction (group × time) for HRmax (p = 0.006). Also, oxygen pulse significantly increased only in HITG from 22.9 ± 4.4 to 23.9 ± 4.2 ml/beat, with no interaction (p = 0.150).

conclusionsEleven HIT sessions added to usual training did neither improve VO2max nor haematological parameters compared to the CG.

Indexed as

AthletesAdultBlood VolumeExercise TestFemaleHemoglobinsHumansMaleOxygen ConsumptionPhysical Conditioning, HumanPhysical EnduranceYoung AdultHemoglobinsBlood volumeHigh-intensity interval trainingMaximal oxygen uptakePlasma volumeTotal haemoglobin massWell-trained individuals

Identifiers

PMID26164709
OpenAlexW1152310673

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.